There are many different ways to make a cup of tea. What on the surface looks like a simple set of instructions has spawned a plethora of different styles and preferences. You can have whole milk, skimmed milk, oat milk, no milk, 1 sugar, 2 sugars, 100 sugars, or none, and so much more. Indeed many people have many differing tastes when it comes to preparing tea, but there is one particular method, unlike the others, that is universally frowned upon. It is considered taboo, a strict no-no. This method would only be found in the forbidden section of the Hogwarts library.